USGS WPhase Moment Solution
OFF COAST OF WASHINGTON
12/08/19 8:07:36 Epicenter: 47.772 -128.625 MW 5.6 USGS/WPHASE CENTROID MOMENT TENSOR 12/08/19 08:07:36.00 Centroid: 47.572 -128.923 Depth 11 No. of sta: 35 Moment Tensor; Scale 10**17 Nm Mrr=-0.32 Mtt=-2.64 Mpp= 2.96 Mrt=-1.12 Mrp= 1.61 Mtp=-0.32 Principal axes: T Val= 3.71 Plg=23 Azm=262 N = -0.59 55 133 P = -3.12 23 3 Best Double Couple:Mo=3.5*10**17 NP1:Strike= 43 Dip=56 Slip= 0 NP2: 133 90 -145
The figure above shows a visual representation of the style of faulting (focal mechanism)
derived from the estimated moment tensor.
Shaded areas show quadrants of the focal sphere in which the P-wave first-motions
are away from the source, and unshaded areas show quadrants
in which the P-wave first-motions are toward the source.
The dots represent the axis of maximum compressional strain
(in black, called the "P-axis")
and the axis of maximum extensional strain (in white, called the "T-axis")
resulting from the earthquake.
